public string Login(string email, string password)
        {
            User user = _unitOfWork.AuthRepository.Login(email);

            if (user == null)
            {
                return(null);
            }

            if (!StaticHelpers.VerifyPasswordHash(password, user.PasswordHash, user.PasswordSalt))
            {
                return(null);
            }

            return(StaticHelpers.EncryptToken(user.FirstName + "-" + user.Id));
        }